Scrapings from a patient's rash reveal cercariae. The disease is most likely
A) Lyme disease.
B) Rocky Mountain spotted fever.
C) relapsing fever.
D) swimmer's itch.
E) Chagas' disease.
D
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________ are the adhesive glycoproteins associated with most animal cells that function in calcium-mediated cell-cell recognition and adhesion.
Fill in the blank(s) with the appropriate word(s).
The obvious advantage of the lactose operon is
that a. it allows bacteria to survive in the presence of lactose. b. lactose-metabolizing enzymes need not be made when lactose is not present. c. it enables bacteria to make lactose only in the presence of the proper enzymes. d. it negates the need for milk in the diet of adult humans. e. it enables glucose to substitute for lactose in the diet of lactose intolerant persons
The pulmonary circuit of blood flow pumps blood to the ____
a. heart b. brain c. liver d. lungs e. all body cells
A(n) ______________ is an overreaction by the immune system to an allergen
Fill in the blank(s) with correct word